Carbureter.



W. SHAKESPEARE,- Ja, & W. SCHMID.' I

CARBURETER.

MPLICATION FILED DEC. x1. 1914.

Patented July 24, w17.

2 SHEETS-SHEET 2.

UMTED i; TENT oFrIoE.

'WILLIAM SHAKESPEARE, JE., AND WILLAM SCHMID, 0F ASSIG-NUBS TO 'WILLIAM SHKESEERE, IIR. CQMPANY, GF

KALIAZOO, MICHIGAN', KALAKAZOG, MICHIGAN.

Canam-seran..

To 'all whom it may concern.'

Vlle it known that We, WILLIAM SHAKE- slimme, Jr., and WILLIAM Scrum), citizens of the UnitedStates, residing at Kalamazoo,

Michigan, have invented certain new and useful Improvements in Carbureters, of which the followingr is a speeicat-ion.

rlhis invention relates to improvements in carbureters.

The main objects of this invention are: First, to provide an improved carbureter in which the proper relative proportions of the fuel and air are automatically maintained throughout varying running conditions of the engine.

Second, to provide an improved 'throttle vcontrolled carbureter in which the relative proportions of fuel and air are automatically maintained throughout the scope of the throttle adjustment.

rl`hird, to provide in a carburetor anim-- proved valve mechanism which is not likely to get out of repair or adjustment in use nd one which is very simple in its operation.

Further objects, structural details,

andobjects relating to will definitely appear from the detailed description to follow.

We accomplish the objects of our invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of our invention is clearly illustrated in the accompanying drawing forming a part of this specification, in which:

Figure I is a perspective view of our inl" provedl carbureter.

Fig., Il is a vertical central section of* o i 1 ry improved carbureterfparts being shown 1n` full lines to 'better illustrate the same.

Fig. HI is an enlarged vertical sectionw on a line corresponding to line 3-3 of Figs. Il and IV.

Fig. IV is a detail section on a line cor` responding to the broken line et-i oi".vv Fig. Il.

Fig. V is a detail section on a line corresponding to line of'ig. Il.

- Fig. Vl is an end viewlooking! from the right of Fig. ll.

Fig. VH is a transverse sectionon a line corresponding to line 7-7 ot Fig'. il.

ln the drawing .':imilar reference charac Specification of Letters Patent.

chamber in the member 1 constitutes a mix-` Patented July 24,1917, Application led December 11, 19M. Serial No. 878,628.

parts throughout the ing chamber 3 and delivery passage which end by the is controlled at its delivery s. own being of throttle valve 4, the valve the well known butterfly type having an arm 5 to which the operating connections are made. The passage in the body member 2 constitutes the supply orair inlet passageands provided with a hot air inlet 6 and the cold air inlet 7 both' controlledl As the details of` our present invendescribed herein. provided with a by ,the rotaryv al've 8. this valve form no part of tion they are not further The body member 2 is fuel reservoir 9 having an inlet connection 10 controlled by the valve 11. This'valve is controlled by the float l2 carried by the `lloat lever' 13 which is pivoted at 14 and adapted to engage the stem of the valve 11. The reservoir is provided with a removable cover plate and with a draw off cock 16 through which any sediment collected inthe reservoir may reservoir. I

The body sections able screws 17. The body section is provided with perforated ears 18 by means ofv which the carbureter may be attached to the manifold as is common ininternal combustion engine practice her 21s provided with an The body memannular shoulderseat constituting the mixing chamber 3. lVithin the body is an automatically actuated member 20, the member being supported so that it is actuated by thesuction withinthe carbureter. This member 2() is yadapted to seat on the valve seat 19 and constitutes an air valve for the mixing chamber 3.` The member 2() is chambered to provide acarbureting chamber 21 which has a plurality of delivery openings 22 delivering into thefmixing chamber 3.

The tubular nozzle member into the ca rbureting chamber andl is connected to the reservoir b v the passage 24. rlhe fuel nozzle 25 is threaded into the member 23 for be drawn oli by flushingl the-n are1connected by suit- 23 projects adjustment therein, the nozzle being pron0 g A l 1,234,227

` ing its longitudinal passage with the nozzle member 83.

. At its upper end the fuel nozzle 26 has a fuel valve seat Q9. The carbureting chamber valve zEllis annular to embrace the upper end of' the fuel nozzle and has a conical por- 1b tion 31 courting with the upper end of the fired nozale member 23 and a sleeve-like portion 32 slidably embracing the nozzle member. This sleeve-like portion has air inlet Openings 3U opening into the air inlet passage oi the carbureter below the mixing chamber valve. The fuel valve 34 is of the needle type, its point coacting with the fuel nozzle as shown in Fig. III.

` The valve member is provided with a 20 Astem-like plunger 35 coacting with the dash pt'dwhich is disposed in the mixing chamber or on the inner side of the valve membersofthat it is subject to the variations in the air pressure or degree of vacuum in the '25 mixing chamber. It is found quite satisfactory in practice to permit thev air to escape from the dash-pot around the plunger. 7The plunger 35 serves as a guide stemv for the valve member 20. The plunger 35 is Ahollow 3o to receive the stem of the fuel valve,.and is' provided with an adjusting screw 37 for the fuel valve, the fuel valve being held against its adjusting screw by means of the coiled spring, 38.

35 'It is intended that the fuel valve shall be adjusted to its `proper place when the car bureter is assembled and it is not intended. for adjustment by the user as that is not necessary. Such operating adjustment as is `4o required is effected by the adjustment of the fuel nozzle.

The dash-pot for the valve member 20 prevents chattering and fluttering of the f valves.

By locating the daslrpot of the suction actuated member in the mixing chamber it is subject to all variations of air pressure therein due to throttle or engine control and the running conditions of the engine, which renders the suction actuated member very sensitive and quick acting and quickly responsive to the throttle control and the running conditions of the engine.

Were the dash-pot subject at all times to atmospheric air pressure or to any air press'ure other than that of the mixing chamber, there would be, under ordinary running conditions, a constant variation between such air pressure and that acting upon the suction actuated member thereby preventing evenness in the movement or action of the suction actuated member under the varying suctions or degrees of vacuum in the mixing chamber. and where a liquid dash-pot is provided the same variations occur. When,

however, the dash-pot is in the mixing chamber and subject to the variations of air pres' sure therein these conditions are overcome and the actuated member is very sensitive and quick in its action;

A; further advantage o arranging the dash-pot in the mixing chamber is that it is easy to locate it so that it constitutes an effective guide for the suction actuated member, Further, it is entirely inclosed and cannot be distorted by carelessness when the carbureter is assembled in an automobile or from" accidental blows or the like while in use.

A still further advantage is that where the dash-pot is open to atmospheric air it is likely to draw in dust ,and dirt and become clogged thereby. When located in the mixing chamber, any dust that enters the mixing chamber with the incoming air is not likely to passto the dash-pot, but is, owing to the velocity of the air, drawn past the dash-pot into the manifold.

A, still further advantage is that when positioned Within the mixing chamber it is Asubject to the vapors therein so that in practice it is effectively lubricated. This accomplishes a double purpose,-that of preventing wear and frictioztand, further, the moisture forms a suitable packing so that a free sliding ,5t may be had between the parts without objectionable leakage past the plunger, In fact, practical use of the structure has demonstrated that the action is very superior to that in structures in which the dash-pot is subject to atmospheric air or to structures in which the dash-pot is of thev oil or liquid type.

With the parts thus arranged we provide a structure in which the relative proportions of air and fuel are automatically maintained throughout varying running conditions `of vas the engine and throughout the throttle ad: y

justment, the carbureter being controlled for normal operation entirely by the engine throttle.

Our present improvements are an adaptation and in some respects an 4improvement upon the structure illustrated and described in Letters Patent No. 1107713, issued to us August 18, 1914, and that shown in our Letters Patent, No. 1,183,125, issued to usMay 1G, 1916.

.-f. lVe have illustrated and described our present improvements in the form in which we have embodied the same in practice. We have not illustrated or described various modifications which we contemplate as ive believe the disclosure made will enable those' skilled in the art to embody our improvements as conditions may dictate. We de sire, howevento be understimd as claiming our improvements specilically in the form, illustrated as well as broadly within the scope of the appended claims.

, Having thus described our invention, what we claim as new and desire to' secure by Letters Patent, is:

1. In a carburetor, the combination of a body having an annular air-valve seat therein, the chamber above the said valve seat constituting ,af mixing chamber, asuction actuated member constituting a mixing chamber valve coacting with said valve seat and having afcarbureting chamber therein deliven to said mixing chamber, a lixed nozzle inem er chamber, a fuel nozzleodisposed within said nozzle member and threaded for adjustment therein, an annular carburcting chamber valvecarried by said suction actuated memi ber and having a conical portion coacting with the upper end of said nozzle member and a sleeve portion slidably embracing said nozzle member and provided with air inlets, mhollow plunger on the inner side of said suction actuated member, a dash-pot for said plunger disposed within said mixing chamer, and a needle fuel valve arranged in said lunger to coact withsaid fuel nozzle.

2. n a carburetor, the combination of a' body having an annular air valve seat therein, the chamber above the said valve seat constituting a mixing chamber, a suction actuated member constitutin a mixing cham-- ber valve coacting with said'valve seat and having 4a carbureting chamber therein delivering to said mixing chamber, a fixed nozzle member rejecting into said carbureting chamber, a uel nozzle disposed within said nozzle member and threaded for adjustment therein, an annular carbureting chamber valve carried by said suction actuatedV member and having a conical portion coacting 401 with the up er end of said nozzle member, and a need e fuel valve mounted on said suction actuated member.

3. In a,carbureter the combination of a bod having an annular air valve seat therein, the chamber above the said valve seat constituting a mixing chamber, a suction actuated member constituting a mixing chamberlvalve coactin'g` With said valve seatand having a carbureting chamber therein delivvby said suction actuated. member and embracing the upper end of said nozzlefa,

needle fuel valve carried by said suction actuated member to coact with said fuel noz valve coacting with said valve scat and hav- .fuel nozzle delivering projecting into said carbureting' ring to said mixing chamber, a fuel nozzle delivering to said carbureting chamber, anY annular carburetingchamber valve carriedy ing alcarbureting,chamber therein delivering to said mixing chamber, an adjustable to said carbureting chamber, an annular carbureting chamber valve carried by said suction actuated nicmbcr and embracing the upper end of said nozzle, a dash pot. for said suction actuated member disposed within said mixing chamber, a needle fuel valve carried by said suction actuated member and-coacting with said fuel nozzle 5. ln a carbureter, the combination of a body provided -ivith a mixing chamber, a suction actuated member constituting a mixing chamber valve and having a carbureting chamber therein delivering to said mixin chamber, a fuel nozzle delivering to sai carbureting chamber, a carburetin chambet` valve carried by said actuated mein ier, avfuel valve coacting with said nozzle and carried by said actuated member, means for adjusting said nozzle from the outside of the body.

6. In a carbureter, the combination of a body provided with a' mixing chamber, a suction actuated member constituting a mixing chamber valve and having a carbureting chamber therein delivering to said mixing chamber, a fuel nozzle deliveringto said carbureting chamber, afiiel valve coacting with said nozzle and carried by said suction actuated member and adapted to regulate `the fuehand a carbureting chamber valve carried by said suction actuated member and adapted to regulate the air admitted to`the carbureting chamber.

7. ln a carbureter, the combination of a mixing chamber, a suction actuated meinber constituting a mixing chamber valve and having a carburcting chamber therein delivering to said mixing chamber, a fuel nozzle delivering to said carburetingY cham? t ber, a carbureti'ng chamber valve carried by said suction actuated member, a needle fuelf valve carried by said suction actuated meinber and coactiiig wit Vsaid nozzle, and a dash-pot for said suction actuated member disposed within said mixing chamber.

` 8. In a carburetor, the combination of a mixing chamber, a suction actuated mixing chamber valve, a carbureting chamber delivering to the said mixing chamber, a fuel nozzle delivering to said carbureting chamber, a carbureting chamber valve carried by, said suction actuated member, a fuel valve coacting with said nozzle carried. by saidsuction actuated member, and adash pot forA said suction actuated member 'disposed 'so that it is subject to the variations of pres-- sure on the inner side of the mixing cham-- bei' valve. l

9. ln a carburetor, the combination of a mixing chamber, a carbureting chamber delivering to said mixing chambena throttle valve for said mixing chamber, a suction actuated inlet valve for said mixing chaml a body provided with a mixing chamber, a

suction actuated member constituting a mixing chamber valve and-having a carbureting chamber therein delivering to said mixing chamber, a vfuel nozzle delivering to said carburetnig chamber a' cai-bursting chamber valve carried by said suction actuated member, and 'adapted 'to uniformly vary the ai! deliveredto said carbureting chamber, and a fuel valve carried by said suction actuated member and coacting with said nozzle.

1l. In a carburetor, the combination of a cliambered body provided with an annular shoulder-like valve seat, thc chamber above said valve seat constituting almixingchambei' and that below an air supply chamber, a Vsuction. actuated memberf'coacting with said valve seat and constitutinga mixing chamber valve, said suction actuated member having a carbureting chamber therein delivering to said mixing chamber above scid valve seat, a fuel nozzle delivering to slid carbureting chamber, a carbureting chamber air inlet valve coacting with said nozzle to vary the air delivered to the car- ;buretinrf chamber with the opening' and closiii.`r of said mixing chamber valve, and

a fuel valve carried by said suction actuated member to coact with said fuel nozzle.

l2. In a carbureter, the combination of a' chambered body provided with an annular valve seat, the chamber above the seat constituting a mixing chamber and that below anrair inlet chamber, a mixing chamber valve coacting with said mixing chamber valve seat providing when open an unobstructediannular port,'a carbureting chamber delivering to saidmixing chamber centrally above its said port, a-\ uel nozzle disposed to deliver' centrally to saidcarbureting chamber, an annular tapered carbureting chamber air inlet valve 'surrounding said nozzle providing when open an unobstructed annular air inlet port for said carbureting chamber to which said fuel nozzle delivers centrallyJ and a fuel valve extend-v Ving into the delivery orifice of said fuel nozannular fuel port delivering centrally to said annular carbureting chamber air inlet port said mixing and carbureting chamber valves and fuel valve being operatively associated fora simultaneous operation by the air mixing chamber valve, said el nozzle being ad'ustablc to regulate the fuel 13. n a carbureter, the combination of a chambered body provided with an annular. valve wat, the chamber above the acct conzle to provide an Abetween''-it and said nthrottle and.

casing to the 'stit'uting a mixing chamber and that below an air inlet chamber, a mixing chamber valve coacting with said mixing chamber valve ,seat providing when open an unobstructed annular port, a carbureting`cham ber delivering to said mixing chamber centrally above its .said port, a fuel nozzle disosed to deliver centrally to said carburet-` ing' chamber, an annular carbureting chamber air inlet valve surrounding said nozzle providing when open an unobstructed annular air inlet port for said carbureting chamber to which said fuel nozzle delivers centrally, and a fuel valve extending into the delivery orice' f said fuel nozzle to provide an annular fuel port delivering centrally to said annular carbureting cham- 'bei' air inlet port, said mixing and carbureting chamber valves and fuel valve vbeing operatively associated for simultaneous op-v eration by the air passing to the mixing chamber valve. v

14. In a carbureter, the combination of a chambered body provided with an annular valve seat, the chamber above said seat constitnting a mixing chamber and that below an air inlet chamber, a suction actuated member constituting a mixing chamber valve coacting with said seat and providing when open an unobstructed annular port, said suction actuated member being provided with a carbureting chamber delivering to said mixing chamber centrally above said port, a fuel nozzle disposed to deliver centrally to'said carbureting chamber7 an I annular carbureting 'chamber air inlet valve carried by said suction actuated mem' ber for actuation therewith and surrounding said nozzle providingan annular air inlet port for said carburetmg chamber, and a fuel valve carried by said air actuated member and extending into the delivery orifice of said fuel nozzle to provide an annular fuel port delivering centrally into said carbureting chamber air inlet port.

15. In a carbureter, the combination of a chambered body provided with an annular valve seat, the chamber above said seat constituting a mixing chamber and that below anV air inlet chamber, a suction actuated member coacting with said seat and constituting a mixing chamber valve and providing when open an annular port2 said suction actuated member being provided with a carbureting chamber arranged to deliver to said mixing chamber, a fuel nozzle disposed to deliver to said carbureting chamber7 a carbureting'. chamber air inlet valve mounted on said suction actuated member to coact with said nozzle providing an air inlet port for said carbureting chamber, and a fuel valve carried by ber to coact with said fuel delivery nozzle.

16. In a, carbureter, the combination of a chambered body provided with an annular said suction actuated memdelivery orifice of said fuel stituting valveseat, the chamber above ther seat obnseat and constituting a. mixing chamber valve providing when open an annular port, said suction .actuated member being provided with a carbureting chamber delivering to said mixing chamber centrally above its said port, a fuel nozzle disposed to deliver to vsaid carbureting chamber, an annular carbureting chamber air `inlet valve carried by suction actuated member and surroundsaid when open an ing said nozzle. providing annular air inlet port for said carbureting chamber, and a fuel valve'carried by said suction actuated member extending into the nozzle providing an annular fuel -port delivering to said carbureting chamber centrally of said car K `valve .carried by member coacting with said `fuel nozzle, a

bureting chamber air inlet port.

17. ./In a carbureter, the combination of a chambered body valve seat, thechainber above the seat constituting a mixing chamber, a suction actuated member coacting with said valve seaty and constituting a mixing chamber valve,-

a mixing chamber, a suction Vactuatcd membei' coacting with said valve provided with an annular l our hands and seals in throttle valve, and a dash pot vfor said suction actuated member disposed between said suction actuated suction .actuated member constituting one member of the dash pot.

1 18. In a carburetor, the combination of a mixing chamber, a suction-actuated member constituting a mixing a 'carbureting vchamber ltherein delivering to -said mixing'cliambei', a fuel nozzle deliverying to said carbureting chamber, an air -valve for said carbureting chamber-,carried by said suction actuated member, and a' n dashpot for said vsuction actuated member disposed centrally Within the mixing chamb er so that itis subject only to the varia tions of pressure in the mixing chamber.

19. In a carburetor, the combination of a mixing chamber, a throttle valve therefor,

a suction actuated air inlet valve for said mixing chamber, a fuel valve carried thereby, and a dashpot for said suetion-actuated valve disposed'centrally Within the mixin chamber and so that it is' subject only to the variations. of pressure in the mixing chamber. i.

In Witness whereof, we have hereunto set the presence of two Witnesses.

WILLIAM SHAKESPEARE, Ja. [1.. 8.] WILLIAM sommi. [1.. s] 'Witnesses:

LUELLA GREENFIELD, NELLIE M. HOPKINS.

member and throttle, said chamber valve having. 

